Will a 1991 Cadillac Sedan De Ville front drivers side fender fit on 1993 ville?

It's highly likely, but not guaranteed. While the 1991 and 1993 Cadillac Sedan DeVille are very similar, there might be subtle differences in the bodywork between model years. The fenders *should* be interchangeable, but you should verify this by:

* Checking part numbers: Find the part number for the fender on a 1991 and a 1993 DeVille. If the numbers match, they are likely interchangeable. You can usually find these numbers on the part itself, or through a parts catalog (online or from a parts store).

* Comparing visual details: If you have access to both cars, compare the fenders closely. Look for any significant differences in shape, mounting points, or the location of holes.

While it's probable they'll fit, it's always best to confirm compatibility before purchasing and installing the fender to avoid any issues.